package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
@Slf4j
@Service
public class DishServiceimpl implements DishService {
    @Autowired
    DishMapper dishMapper;
    @Autowired
    DishFlavorMapper dishFlavorMapper;
    @Autowired
    SetMealDishMapper setMealDishMapper;
    @Override
    public void save(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //菜品表操作
        dishMapper.save(dish);
        //口味表操作
        //获取insert生成的主键值
        Long dishId=dish.getId();
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0)
        {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
        dishFlavorMapper.insert(flavors);
        }
    }

    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        //设置页码
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.page(dishPageQueryDTO);
        long total=page.getTotal();
        List<DishVO> dishes=page.getResult();
        return new PageResult(total,dishes);
    }

    @Override
    public DishVO getById(Long id) {
        DishVO dishVO=dishMapper.getById(id);
            List<DishFlavor> falavors=dishFlavorMapper.getByDishId(id);
            dishVO.setFlavors(falavors);
        return dishVO;
    }
    @Transactional
    @Override
    public void delete(List<Long> ids) {
        //判断当前菜品是否是起售中的菜品,否则不可删除
        List<Dish> dishes=dishMapper.select(ids);
        for (Dish dish:dishes)
        {   if (dish.getStatus().equals(StatusConstant.ENABLE))
            {throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);}
        }
        //判断是否被套餐关联
        List<Long> setmealIds=setMealDishMapper.getSetmealIdByDishIds(ids);
        if (setmealIds!=null&&setmealIds.size()!=0)
        {throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);}
        //删除菜品数据
        dishMapper.delete(ids);
        //删除菜品关联的口味数据
        dishFlavorMapper.delete(ids);
    }
    @Transactional
    @Override
    public void update(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //更新菜品表
        dishMapper.update(dish);
        log.info(String.valueOf(dish));
        //删除口味信息,再增加口味
        List<DishFlavor> flavors=dishDTO.getFlavors();
        List<Long> ids=new ArrayList<>();
        ids.add(dishDTO.getId());
        if(flavors!=null&&flavors.size()!=0)
        {
            flavors.forEach(flavor->{
                flavor.setDishId(dishDTO.getId());
            });
           dishFlavorMapper.delete(ids);
            dishFlavorMapper.insert(flavors);
        }

    }

    @Override
    public List<Dish> getTypeId(Integer id) {
        List<Dish> dishes=dishMapper.getByTypeId(id);
        return dishes;
    }

    @Override
    public void startOrStop(Integer status,Long id) {
        Dish dish=new Dish();
        dish.setStatus(status);
        dish.setId(id);
        dishMapper.update(dish);
    }

    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}
